OK, I understand the appeal of doing things on your own. That being said, do not discount the information that Foye (ftroute) has put forth. Driving in Italy is somewhat precarious at best. The roads are far more narrow than their American counterparts. Believe it or not, Italian drivers are very competent, but, their driving style can be a little discombobulating to the average North American driver. Understand that a country that gave us the Ferrari and the Lamborghini does not always have the tourist driver in mind. (of course, if I could arrange a drive with an Enzo or a Murcielago, I would willingly take the chance.)